Top "Apply-templates" questions

What are the differences between 'call-template' and 'apply-templates' in XSL?

I am new in XSLT so I'm little bit confused about the two tags, <xsl:apply-templates name="nodes"> …

xslt apply-templates
XSL named parameter 'with-param' using 'apply-templates'

My questions are at the bottom of this post, if you wish to read them before the full explanation. I'm …

xslt parameters stylesheet apply-templates